Structure And Properties Of Special Rubber/Montmorillonite Nanocomposites

As rubber reinforced material,Montmorillonite can make rubber get a variety of excellent performance,rubber/montmorillonite nanocomposite material is one of the hotspots of materials research.In this paper,rubber/organic montmorillonite nanocomposites(OMMT)were prepared by melt blending.The effect of different kinds of the organic montmorillonite modified by alkyl ammonium and the content of organic montmorillonite on structrues and properties of nanocomposites were investigated.The main contents and conclusions of the paper are as follows:(1)The effect of the organic montmorillonite on the rubber is in order from high to low: Double-length-carbon-chain-alkyl-modified montmorillonite>Mono-carbon-alkyl-modified montmorillonite > Short-carbon-chain-alkyl modified Montmorillonite.It was found that I.44 P organic modified range in montmorillonite as "V" type,the steric hindrance effect is large,the enhancement effect is the best,I.30 P modifier has the advantage of long carbon chain,and the enhancement effect is better than that of short carbon Chain of Bengel434.(2)The results showed that the bigger the initial interlayer spacing of the organic montmorillonite is,the stronger the XRD diffraction intensity of the composite material formed with rubber,the more the number of rubber molecular chains inserted into the montmorillonite layer,the better the dispersion in rubber,the better the compatibility of montmorillonite and rubber.(3)After the addition of organic montmorillonite,the curing time of BIIR and BSBBR was prolonged.It was found that the montmorillonite lamellar structure could block the reaction between rubber molecular chain and vulcanization assistant,thus hindering the vulcanization of rubber.(4)BSBBR has a unique three-dimensional structure and a high branch structure,so that the mechanical properties and gas barrier performance of BSBBR and its nano-composite materials is significantly better than BIIR.(5)After adding organic montmorillonite,the thermal stability of the rubber is improved,but the thermal stability of I.44 P and I.30 P nanocomposites are better than Bengel434.